Multiple-drill machine



W. WETSEL.

MULTlPLE DRILL'MACHINE. APPLICATION FILED MAY 29. 1919- Patented Jan. 18, 1921.

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Patented Jan. 18, 1921.

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AP LICATION FILED MAY 29 1919- 1,366,044. Patented Jan. 18,1921.

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MULTIPLE DRILL MACHINE.

APPLICATION 'FILED' MAY 29. I919.

v Patented Jam-18,1921.

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MULTIPLE DRILL MACHINE.

APPLICATION mu) MAY 29. 1919.

1,36 ,044, Patented Jan. 18,1921.

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. -4 ATTORNEY W. WETSEL.

MULTIPLE DRILL MACHINE. APPLICAT10N FILED MAY 29. I919. 1,366,044. Patented Jan. 18, 1921.

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INVENTOR M -w ATTORNEY W. WETSEL.

MULTIPLE DRILL MACHINE. APPLICATION FILED MAY '29. 1919.

Patented Jan. 18,1921.

7 $HEET$SHEET 7 UNITED STATES PATENT OFFICE.

WEST WETSEL, OF CHICOPEE, MASSACHUSETTS, ASSIGNOR TO BAUSH MACHINE TOOL COMPANY, OF SPRINGFIELD, MASSACHUSETTS, A CORPORATION OF MASSACHU- SETTS.

MULTIPLE-DRILL MACHINE.

Specification of Letters Batent. Patented J 18 1921 Application filed May 29, 1919. Serial No. 300,570.

To all whom it may concern Be it known that I, \Vns'r WETSEL, a citizen of the United States, residing in Chicopee, Massachusetts, have invented certain new and useful Improvements in Multiple- Drill Machines, of which the following 1s a specification.

My invention aims to provide certain improvements in the mechanism for controlling the travel of the head whereby the machine can be operated more rapidly and w th greater ease than has been the case witl previous constructions.

The accompanying drawings illustrate embodiments of the invention.

Figure 1 is a side elevation of a complete machine;

Fig. 2 is a horizontal section shown of a detail;

Fig. 3 is a separate view of the air valve; Fig. 1 is a side elevation of the principal parts of this improvement;

Figs. 5 and 6 are separate Fig. 1; I

Fig.7 is a plan of the principal parts of the improvement;

Fig. 8 is a front elevation of the feed operating shaft with certain parts thereon in section;

Fig. 9 is a section of separate details of F i 8 Fig. 10 is a front View of the operating mechanism;

Fig. 11 is a side elevation showing the invention applied to a different design of drill; Fig. 12 is a plan; Fig. 13 a side elevation and Fig. 1 1 an end elevation of the mechanism of Fig. 11.

Referring to the embodiment lllustrated in the accompanying drawings (Figs. 1 to 10), the column 1 has a head 2, and has on its face guides 3 on which slides a head 1 carrying a number of spindles for drills, the spindles being driven by a rotating shaft 5 sliding up and down through the hub of a pulley 6 by which it is driven, the pulley in turn being driven by a belt 7; all these parts being of any usual or suitable design and arrangement. The work is supported on a table 8 which is adjustable in height and the drills depend from the head 1. The present invention has to do w th the feeding of the head downward to bring the drills to the work and with the withdrawal and advancement of the head. Heretofore the head has been raised by a hand gear, being details of counter-balanced by a weight within the column 1 connected to a cable 9 running up over a pulley at the top and down to the head. This hand gearing has been used also to bring the head downto a point where the drills strike the work, after which power operated mechanism has been clutched in for feeding the drills through the work. i

I propose to use a comparatively high speed low-powered motor or mechanism for withdrawing the head and for advancing it to the work in combination with a comparatively low speed high-powered mechanism for actually feeding the drills into the work. This avoids the slow and laborious hand operation previously necessary and makes it possible to secure a very much increased output with less fatigue on the operator. For the withdrawal and advancement of the head I prefer to use an air motor and to mount it on the moving head of the machine.

The head 4 carries a transverse shaft 10 with a pinion 11 engaging a rack 12, Fig. 7, arranged vertically on the face of the c0lumn 1. The shaft 10 is connected at one end to mechanism by which the head can be forced down to feed the drills. The shaft 10 is connected at its opposite end with the rotary driving shaft of an air motor 13. An air valve 14 is mounted in a supporting bracket having arms 15 and 16 fastened to the head. Its right and left hand ports are connected to the ports of the motor by ordinary tubing (omitted from the drawing for the sake of clearness), its lower port being connected by a looped flexible tube 17 (Fig. 1) to any source of compressed air and its upper port being an open exhaust. The horizontal spindle 18 of the valve projects through the casing at both sides and has an arm 19 on the outer end and an arm 20 on the inner end, the angular relation thereof being indicated in Fig. 4;. The arm 20 is connected to a rod 21 which extends to the front of the machine where it is connected in turn to a lever or handle 22 pivotally mounted on a bracket on the front of the head 4. The arm 19 on the valve spindle is operated automatically as hereinafter described. I

()n the shaft 5 just above the head 4, Fig. 1, is a pulley 23 which through a. belt 24 drives a pulley 25 on the end of a shaft running into a change speed transmission 26, which drives a shaft 27 at a speed and power determined by its adjustment through a bracket and connected change feed lever 28; mounted on the head and traveling up and down therewith. It is unnecessary to illustrate these in full as the are common parts of machines of this sort and any one of a number of designs may be used without affecting the present invention.

The shaft 27 extends down into a casing 29 carrying beveled gearing by which it drives a hollow shaft 30, Fig. 5, through which passes a shaft 31 carryingat its inner end, Fig. 8, a worm 32 engaging a worm gear 33 which is loose 011 the shaft 10 previously referred to. A clutch member 34 is fixed on the outer end of the hollow shaft 30. A co-acting clutch member 35 is splined on the shaft 31 and is operated by an arm 36 forming with the arm 37 (Fig. 4) a lever all these parts being which is mounted on a pin 38 journaled in a bracket on the outer side of the casing 29. The hollow shaft 30 is continuously rotated. The worm shaft 31 is driven only when it is clutched in.

The Worm gear 33 on the shaft 10 is formed on its outer face with a toothed clutch member 39. A correspondingly shaped clutch member 40 splined on the shaft 10 is provided with a circumferential groove engaged in the usual way by pins on the end of a forked operating lever 41. A spring 42 within the clutch member 40 tends to separate it from the worm gear so that the latter may rotate freely on its shaft. The clutch operating arm 41 is mounted on a shaft 43 mounted in bearings on the head and extending to the front thereof (Figs. 1 and 4), where it is provided with a crank handle 44 adjacent to the handle 22 of the valve operating rod.

The worm gear is held in the clutched position by means of a pawl 45 (see especially Fig. 9) the end of which engages the outer face of the clutch operating arm 41. The pawl is mounted, as shown in Fig. 4, in a bracket 46 and is supported on a lever 47 mounted on a stud 47 (Fig. 7) on the same b a link 48 with an arm 49 on the pin 38. hen the pin 38 is rocked to lower the arm 49 the end of the lever 47 is raised, the pawl 45 is disengaged from the arm 41 and the spring opens the clutch. When the lever 47 is again lowered the awl 45 will rest on the end of the arm 41 as in Fig. 7) and when the latter is turned .to the clutching position will catch the arm 41 and hold the parts clutched together.

Thus when the clutch on the shaft 10 is in and the clutch on the worm shaft 31 is also in, the feed shaft will be operated to force the head down with great power, sufficient to feed the drills into the work. When either of these clutches are out there will be no feeding. Furthermore, supposing the worm shaft 31 unclutched from its driving gear but the pinion shaft 10 still clutched to the worm 33, the pinion shaft will be locked by the worm 32 and it will be practically impossible to move the head up or down.

Connected to the arm 37 and moving therewith is also an arm 50 to which is pivotally connected a link 51 (Figs. 4 and 6) which is provided with a slot 52 engaging a pin 53 on the end of the arm 20 of the valve spindle. A spring 55 between the end of the arm 50 and the arm 20 tends to hold these parts separated with the pin 53 in the end of its slot. This yielding connection of the arm 50 to the valve arm permits the latter to be pulled by the rod 21 by hand when the arm 50 is held against movement. Mounted on the side of the column 1 is a vertical rod 56 carrying a trip block 57 which is adjustable in height thereon and is in the path of the arm 37 as the latter moves down with the spindle carrying head. At the end of a downward stroke, when the feed of the drills is to be stopped, the arm 37 strikes the block 57 and is pressed upward. Upon this, the arm 36 withdraws the clutch member 35 so as to release the worm shaft from its driving gear,'the arm 47 moves upward and withdraws the pawl 45 so as to allow the spring to throw out the clutch between the worm gear and the feed pinion shaftand the arm 50 through the spring 55 presses the valve arm 20 over to the left.

Also mounted at an adjustable height on the rod 56 is an arm 58 carrying a trip rod 59 in line with the arm 19 on the outer end of the valve spindle. At the end of an upward movement the arm 19 of the valve strikes the trip 59 and is pressed downward to throw the valve in the opposite direction to that which occurred at the lower end of the stroke.

The method of operation of the machine as a whole is as follows :-The operators position is at the right of Fig. 1, in front of the work. Assume the head is up. He pushes the handle 22 toward the rear, which pulls the rod 21 and the valve arm 20 shifting the latter to the position 20, Fig. 3, thus causing the air under pressure to pass from the pipe 17 out through the branch 60 or down side of the valve and thence to the appropriate port of the motor. The two clutches are out at the time so that the air motor immediately advances the head downward to the drilling position. A careful operator would shut off the air just as the drills are about to reach the work so as to avoid chi ping their edges. But this is not essentia. The power of the air motor is not sufficient to feed the drills. At the end of the advance therefore the arm 20 of the valve will be in either of the positions 20 or 20.

With the. valve arm in its intermediate neutral position or in its down position 20, the. spring 55 will force the arm 50 to the right and throw in the clutch 35. The clutch 40 however will remain out so that the feed pinion shaft 10 will be free to permit its rotation by the air motor.

To commence the feed the operator turns the handle 44 to his right and thus throws in the clutch 4H), and the pawl 45 engages the arm ll and holds the clutch in. The high powered feed mechanism will then actuate the shaft 10 and feed the drills through the work.

When the drills have passed through the work or into it to the desired depth the arm 37 will strike the knock-off collar or trip 57 and lift the arm, turning the pin 38 and the several arms carried thereby. This will lift the pawl 45 and permit the spring to throw out the clutch 40. It will also swing the arm 36 to withdraw the clutch 35. And it will swing the arm 50 and, through the spring 55, push the arm 20 to the position 20 (Fig. 3), which cuts off the air from the down side 60 of the valve, opening the latter to the exhaust port 61 at the top of the valve and opening the air pressure to the up side 62 of the valve, which communicates with the appropriate port of the air motor. The

latter will then operate on the freed shaft 10 and turn it in a direction to quickly lift the head. The valve arm 19 moves with the arm 20 and consequently has been shifted to the position 19 It is not essential touse a spring for throwing out the clutch 40, since this is under easy control by the operator. It would be sufiicient for example, when the head arrives at the end of its feeding movement and the pawl 45 is thrown up as above described, for the operator to manually withdraw the clutch 40. Or if, with a spring as shown, the clutch should bind, the operator can forcibly withdraw it. As the head moves upward and the arm 37 passes up with it the spring 55 will throw in the clutch 35, leaving the clutch L0 open however.

At the upper end of the stroke the valve arm 19 strikes the trip 59 and is thrown down to the middle, neutral, position, and the head comes to a rest at this point.

With the machine of the design shown in Figs. 11 to 14 the construction is considerably simplified. In this machine the column 1 has a head 2,.guides 3 and a drill spindle carrying a head 4: with a verticalshaft 5 as in the first case. The power feed is obtained from a shaft 63 having pulleys at its upper end driven by a belt from pulleys on the shaft 5. At the lower end of the shaft 63 there is provided within a casing 64 suitable gearing for driving a worm gear (35, Fig. 14, mounted loosely on the feed pinion shaft 10, substantially the same shaftasin the first example. 011 the outer end of this shaft is a clutch member (35 splined on the shaft and havingrlutch faces 65" engaging corresponding faces 65" on the worm gear 65, the clutch member 65" being controlled by a fork 66 mounted at its lower end on a' shaft (37 which at the front of the machine carries a handle (38. One branch of the fork or arm .66 is adapted tobe engaged by a pawl (39 ing turned ninety degrees about a vertical.

axis however so that its spindle runs from front to rear of the machine and in fact extends clear to the front of the machine where it is provided with a crank handle 76. r a V The valve stem or rod 7:) has an outwardly extending arm 77 which is pivoted to a block TS having a pin and slot connection with the link 72 and knock-0H arm 73, a spring 70 tending to hold the pin in the end of its slot and to press the link 72 upward so to leave the pawl 69 in its operative downward position. On the rear end of the valve spindle 75 is an arm 80 (Fig. 12) extending toward the column of the machine.

Carried on the side of the column is a knock-oif rod 81 which carries at its lower end a feed trip 82 adjustable in height. The knock-off lever has the inner end of its arm 74 forked and embracing the knock-off rod. hen this forked part strikes the trip the arm 74 is raised, the link 72 depressed and the pawl 9 withdrawn so that either by springs Fig. 14, or by the hand lever (38. the driving mechanism is unclutched from the feed shaft. \Vhen the spindle carrying head rises the link 72 is pushed up by the spring 79 so to leave the pawl 69 free to catch and hold the clutch when the latter is again thrown in by hand.

()n the upper end of the knock-off rod 81 is carried an arm 84, Fig. 12, adjustable in height and placed at such an elevation and ments of my invention yet it is not to be understoodtherefrom that the invention is restricted to the particular mechanisms and arrangements described. Various modifications thereof may be made by those skilled in the art without departure from the invention as defined in the following claims. I have distinguished the movement of the head from its starting point to the drilling position by the term advance, the movement from this point into or through the work by the term feed and the movement from its lowest to its highest position by the term withdrawal; but it will be understood that the invention is not limited to mechanism which shall operate through exactly these distances.

What I claim is:

1. A multiple drill machine having a spindle-carrying head, a comparatively high powered driving means for rotatlng and feeding the drills into the work and a separate comparatively high speed fluid-pressure-operated motor carried by said machine for moving said head between its retracted and its advanced positions independently of said high powered driving means.

2. A multiple drill machine having a spindle-carrying head, a comparatively high powered driving means for rotating the drills and feeding them through the work and a separate motor of comparatively low power insufficient to feed the drills through the work and arranged to move the head between its retracted and its advanced positions independently of said high powered driving means.

3. A multiple drill machine having a spindle-carrying head, a worm drive for feeding the drills through the work and a separate comparatively high speed low powered motor for moving the head between its retracted and its advanced positions independently of said worm drive.

4. A multiple drill maclnne having a spandle-earrying head, a worm drlve for feeding the drills through the work and a comparatively high speed low powered motor for moving the head between its retracted and its advanced positions, a common shaft for applying the power of said worm drive and of said motor. and means for disconnecting the worm drive.

5. A multip'le drill machine having a spindle-carrying head, acomparatlvely hlgh powered means for feeding the head to force the drills into the work and a separate comparatively high speed low powered motor for withdrawing the head and advancing it to feeding position independently of said high powered feeding means.

6. multiple drill machine having a spindle-carrying head and a high speed fluid pressure operated motor carried by said machine for moving the'head between its retracted and its advanced positions in combination with a mechanical high powered means for feeding the head and forcing the drills into the work.

7. A multiple drillmachine having a s indle-carrying head, a continuously driven shaft and mechanism for transmitting movement from said shaft to said head to feed the drills through the work in combination with a separate motor adapted to be operated intermittently and independently of said continuously driven shaft to move the head between its retracted and its advanced positions.

8. A multiple drill machine having a s )indle-carrying head, a continuously driven shaft and mechanism for transmitting movement from said shaft to said head to feed the drills through the work in combination with a separate motor adapted to be operated intermittently to move the head between its retracted and its advanced positions, said'tmechanism for transmitting movement from the continuously rotating shaft including clutching devices adapted to disconnect such shaft.

9. A multiple drill machine havin a spindle-carrying head, a continuously driven shaft for rotating the spindles, motion-transmitting mechanism between said shaft and said head by which the latter is traversed during such rotation of the spindles and an additional motor carried by the machine for traversing the head independently of said continuously driven shaft.

10. A multiple drill machine comprising a vertical column, a s indle-carrying head arranged to slide tiiereon, a continuously driven shaft for rotating the spindles, motion-transmitting mechanism between said shaft and said head by which the latter is caused to slide on the column durin such rotation of the spindles and an addltional motor carried by the machine for sliding said head on the column independently of said continuously driven shaft.

11. A multiple drill machine having a spindle-carryin head, a rack and pinion for traversing said liead, a worm driving mechanism for operating said pinion at a slow rate of speed and a separate comparatively low powered, motor for operating said pinion at a high rate of speed.

12. A multiple'drill machine having a spindle-carrying head, a rack and pinion for traversing said head, a worm drivlng mechanism for operating said pinion to feed the drills at a slow rate of speed through the work and a separate motor for operating said pinion at a high rate of speed to move the head betwen'its retracted and its advanced positions.

In witness whereof, I have hereunto signed my name.

WEST WETSEL. 

